For what it's worth:
I've had the FRPP Track Cal on my 2014 Mustang for about 6 months. I always fill my tank with 93 octane, either Shell or Chevron. I had a JLT catch can on the passenger side and still experienced pinging under certain conditions; more so with octane adjust set to N, and less when it was set to Y. It was clearly noticeable.
I bought JPC breathers and installed them earlier this week, and the pinging is completely gone. No pinging with octane adjust set to N, AC on, and very hot/humid weather where I live.
My JLT catch can always had some oil in the tube after the catch can, so it must have still been letting oil into the intake - which causes pinging according to FRPP.
2014 Track Pack 5.0
Stock except for GT500 axlebacks.